Migrate to CMake project

.gitignore

@@ -0,0 +1,3 @@
+cmake-build-debug/
+/.idea/
+/build/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "airspy"]
+	path = airspy
+	url = https://github.com/airspy/airspyone_host

CMakeLists.txt

@@ -0,0 +1,25 @@
+project(adsbdec)
+
+cmake_minimum_required(VERSION 3.10)
+set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
+include(FindPackageHandleStandardArgs)
+
+add_library(
+        adsbdec-lib
+        demod.c
+        crc.c
+        output.c
+        air.c
+        valid.c
+)
+
+add_subdirectory(airspy)
+
+find_package(LIBUSB REQUIRED)
+
+include_directories(${LIBUSB_INCLUDE_DIR})
+include_directories(airspy/libairspy/src)
+
+add_executable(adsbdec main.c)
+target_link_libraries(adsbdec-lib m airspy-static ${LIBUSB_LIBRARIES})
+target_link_libraries(adsbdec adsbdec-lib)

README.md

@@ -31,4 +31,9 @@ If you need that adsbdec act as server (like dump1090) :
    Need libusb and libairspy
 
   Just do
-> make
+```shell
+mkdir build
+cd build
+cmake ..
+make
+```

air.c

@@ -23,7 +23,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <time.h>
-#include <libairspy/airspy.h>
+#include <airspy.h>
 #include "adsbdec.h"
 
 #define AIR_SAMPLE_RATE 20000000

cmake/FindLIBUSB.cmake

@@ -0,0 +1,37 @@
+# - Try to find the freetype library
+# Once done this defines
+#
+#  LIBUSB_FOUND - system has libusb
+#  LIBUSB_INCLUDE_DIR - the libusb include directory
+#  LIBUSB_LIBRARIES - Link these to use libusb
+
+# Copyright (c) 2006, 2008  Laurent Montel, <montel@kde.org>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+
+if (LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
+
+  # in cache already
+  set(LIBUSB_FOUND TRUE)
+
+else (LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
+
+  find_package(PkgConfig)
+  if(PKG_CONFIG_FOUND)
+    pkg_check_modules(PC_LIBUSB libusb-1.0)
+  endif(PKG_CONFIG_FOUND)
+
+  FIND_PATH(LIBUSB_INCLUDE_DIR libusb.h
+    PATHS ${PC_LIBUSB_INCLUDEDIR} ${PC_LIBUSB_INCLUDE_DIRS})
+
+  FIND_LIBRARY(LIBUSB_LIBRARIES NAMES usb-1.0
+    PATHS ${PC_LIBUSB_LIBDIR} ${PC_LIBUSB_LIBRARY_DIRS})
+
+  include(FindPackageHandleStandardArgs)
+  FIND_PACKAGE_HANDLE_STANDARD_ARGS(LIBUSB DEFAULT_MSG LIBUSB_LIBRARIES LIBUSB_INCLUDE_DIR)
+
+  MARK_AS_ADVANCED(LIBUSB_INCLUDE_DIR LIBUSB_LIBRARIES)
+
+endif (LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)

crc.c

@@ -18,7 +18,7 @@
  */
 #include <stddef.h>
 #include <inttypes.h>
-#include <crc.h>
+#include "crc.h"
 
 static const uint32_t error_table[112] = {
 	0x3935ea, 0x1c9af5, 0xf1b77e, 0x78dbbf, 0xc397db, 0x9e31e9, 0xb0e2f0, 0x587178,